replace 'StaticSim' with the SpirvSim type, material being the Vacuum

crates/coremem/src/render.rs

@@ -1,8 +1,7 @@
 use crate::geom::Meters;
 use crate::real::ToFloat as _;
 use crate::types::vec::{Vec2, Vec3};
-use crate::sim::{SampleableSim, Sample};
-use crate::sim::legacy::StaticSim;
+use crate::sim::{SampleableSim, Sample, StaticSim};
 use crate::meas::{self, AbstractMeasurement};
 use crossterm::{cursor, QueueableCommand as _};
 use crossterm::style::{style, Color, PrintStyledContent, Stylize as _};
@@ -577,6 +576,9 @@ impl<S: SampleableSim> SerializedFrame<S> {
     }
 }
 
+/// this serializes the simulation state plus measurements to disk.
+/// it can either convert the state to a generic, material-agnostic format (static)
+/// or dump it as-is.
 pub struct SerializerRenderer {
     fmt_str: String,
     prefer_static: bool,